CN102072711A - Radial runout non-contact detecting device for rotation shaft system - Google Patents

Abstract

A non-contact detection device for the radial runout of a rotating shaft system belongs to a non-contact detection device related to the technical field of photoelectric detection. The technical problem to be solved is to provide a non-contact detection device for radial runout of a rotating shaft system. The technical solution includes the first and second component racks, the first and second indicating gratings, the first and second receiving tube circuit boards, the first and second receiving tubes, the first and second light-emitting tubes, the first and second light-emitting tube circuit boards, Grating disc, circular cage, gland, spindle, first and second steel balls, cylindrical cage, bushing, base, fixed platform, etc. The first and second component racks are symmetrically installed on both sides of the shaft system. The grating disc is coaxially connected with the main shaft and extends into the groove of the component rack. The tube and indicating grating are aligned with the grating on the grating disc, the rotation of the main shaft drives the grating disc to rotate, and the photoelectric signal is received in the receiving tube, the relative change of the phase of the two signals is the radial runout of the shaft system.

Description

A non-contact detection device for radial runout of rotating shaft system

technical field

The invention belongs to a non-contact detection device for radial runout of a rotating shaft system in the technical field of photoelectric detection.

Background technique

The size of the radial runout of the rotating shaft system represents the rotation accuracy of the shaft system, so its detection accuracy is very important.

The closest prior art with the present invention is the inductance micrometer produced by Zhongyuan Measuring Instrument Co., Ltd., as shown in FIG. 1 . Including base 1, shaft sleeve 2, cylindrical cage 3, first steel ball 4, main shaft 5, first screw 6, gland 7, circular cage 8, second steel ball 9, fixed platform 10 , the second screw 11, the third screw 12, the probe 13 of the inductance micrometer.

The inner hole of the cylindrical cage 3 with the first steel ball 4 installed is fitted on the outer diameter of the main shaft 5, the outer side of the cylindrical cage 3 is fitted with the sleeve 2, and the second steel ball 9 is installed with a ring-shaped cage. The frame 8 is set on the main shaft 5, the lower end of the cylindrical cage 3 is in contact with the annular cage 8, and the inner diameters of the two are aligned, the first steel ball 4 is tangent to the side of the sleeve 2, and the second steel ball 9 Tangent to the lower plane of the shaft sleeve 2, the gland 7 supports it under the annular cage 8, and the gland 7 is fixed on the main shaft 5 with the first screw 6 to form a rotating shaft system. The base 1 is fixedly connected with the shaft sleeve 2 through the third screw 12, and the base 1 is fixed on the fixed platform 10 through the second screw 11, so that the main shaft 5 can rotate freely, and the detected surface of the inductance micrometer probe 13 and the main shaft 5 Contact, the reading head of the inductance meter is placed on the fixed platform 10, and the main shaft 5 is rotated for a circle, and the radial runout value of the rotating shaft system can be read on the inductance micrometer.

The main problem of this inductance micrometer is: this kind of test is a contact test, and the processing error of the tested surface affects the test result, so the processing accuracy of the tested surface is very high, which increases the processing difficulty and processing cost. This kind of detection is a contact detection, and the probe of the inductance micrometer leaves scratches on the surface to be tested, which is damage to the detection surface.

Contents of the invention

In order to overcome the defects in the prior art, the purpose of the present invention is to detect the radial runout of the rotating shaft without contacting the surface of the shaft, which reduces the processing difficulty and cost of the surface to be detected, and at the same time adopts a non-contact method for detection, without To damage the surface to be detected and improve the accuracy of detection, a non-contact detection device for the radial runout of the rotating shaft system is specially designed.

The technical problem to be solved by the present invention is to provide a non-contact detection device for radial runout of a rotating shaft system. The technical solution to solve the technical problem is shown in Figure 2, including the fourth screw 14, the first component rack 15, the first indicator grating 16, the first receiving pipe circuit board 17, the fifth screw 18, the first receiving pipe 19, First luminous tube 20, first luminous tube circuit board 21, sixth screw 22, ring pad 23, pressure ring 24, grating plate 25, second luminous tube circuit board 26, seventh screw 27, second receiving tube circuit board 28. The eighth screw 29, the second receiving tube 30, the second indicating grating 31, the second light-emitting tube 32, the ninth screw 33, the second component frame 34, the third screw 35, the annular holder 36, the pressing Cover 37, first screw 38, main shaft 39, first steel ball 40, cylindrical cage 41, second steel ball 42, shaft sleeve 43, base 44, second screw 45, fixed platform 46.

The inner hole of the cylindrical cage 41 equipped with the first steel ball 40 is fitted on the main shaft 39, the outer side of the cylindrical cage 41 is fitted with the sleeve 43, and the annular cage 36 equipped with the second steel ball 42 The inner hole is sleeved on the lower part of the main shaft 39, and the gland 37 holds it up under the annular cage 36, and is fixed on the main shaft 39 with the first screw 38, thereby forming the measured rotating shaft system. The third screw 35 fixes the measured rotating shaft system on the base 44 through the axle sleeve 43, and the second screw 45 fixes the base 44 on the fixed platform 46, so that the axle sleeve 43 is fixed, and the main shaft 39 can rotate freely; The grating disc 25 and the main shaft 39 are coaxially installed on the shoulder of the main shaft 39, the grating disc 25 is equipped with an annular pad 23, and the ring pad 23 is pressed with a pressure ring 24, and the pressure ring 24 and the main shaft 39 are threaded. Fastening, so that the grating disc 25 is fastened on the main shaft 39; the first component rack 15 and the second component rack 34 are installed on both sides of the shaft system radially symmetrically relative to the main shaft 39, and the radial symmetry is Refers to the central connection line between the widths of the first component rack 15 and the second component rack 34, through the axis of the main shaft 39, the groove openings of the two racks are opposite, and the fixed position of the two component racks can make the grating Disc 25 stretches into the groove of receiving tube and light-emitting tube installed in the component rack; the groove top arm and the lower arm on the first component rack 15 and the second component rack 34 all leave a central hole, and these two holes are the same as Shaft; adjust the position of the first and second components so that the center hole on the groove upper arm and the lower arm of the first component frame 15 is aligned with the center of the grating on the grating disk 25, so that the concave of the second component frame 34 The central hole on the upper arm and the lower arm of the groove is aligned with the center of the grating on the grating disc 25; the first component frame 15 is fixed on the fixed platform 46 with the fourth screw 14, and the second component frame 34 is fixed on the ninth screw 33. On the fixed platform 46; the first indicator grating 16 is glued on the lower surface of the top arm center hole of the first component rack 15, and the first receiving tube 19 is welded on the first receiving tube circuit board 17, and the first receiving tube 19 is welded on the first receiving tube circuit board 17. The tube 19 is installed in the center hole of the top arm of the first component frame 15, the first receiving tube circuit board 17 is fixed on the first component frame 15 with the fifth screw 18, and the first light-emitting tube 20 is welded on the first light-emitting tube. On the tube circuit board 21, the first luminous tube 20 is installed in the center hole of the lower arm of the first component frame 15, and the first luminous tube circuit board 21 is fixed on the first component frame 15 with the sixth screw 22, The second indicator grating 31 is glued on the lower surface of the top arm center hole of the second component frame 34, and the second receiving tube 30 is welded on the second receiving tube circuit board 28, and the second receiving tube 30 is installed on the second receiving tube 30. In the center hole of the top arm of the dual component frame 34, the second receiving tube circuit board 28 is fixed on the second component component frame 34 with the eighth screw 29, and the second luminous tube 32 is welded on the second luminous tube circuit board 26 , install the second luminous tube 32 in the center hole of the lower arm of the second component frame 34 , and fix the second luminous tube circuit board 26 on the second component frame 34 with the seventh screw 27 .

Description of working principle: When the main shaft 39 rotates, the grating disc 25 is driven to rotate coaxially with the main shaft 39 relative to the first indicating grating 16 and the second indicating grating 31. The first indicating grating 16 and the second indicating grating 31 are installed in the same phase, and the rotating The grating on the grating disc 25 and the gratings on the stationary first indicating grating 16 and the second indicating grating 31 respectively produce alternate light and dark stripes, which make the continuous light emitted by the first luminous tube 20 and the second luminous tube 32 respectively The intermittent light that becomes alternately bright and dark is received by the first receiving tube 19 and the second receiving tube 30 respectively. When the main shaft 39 drives the grating disc 25 to rotate coaxially with the main shaft 39, if the radial runout of the main shaft 39 is 0, the phase relationship of the photoelectric signals received in the first receiving tube 19 and the second receiving tube 30 is determined by the phase meter. The phase relationship that does not change is shown above; the main shaft 39 rotates once, if the radial runout of the main shaft 39 is e, the center shaking amount of the grating disc 25 is also e, and the first receiving tube 19 and the second receiving tube 30 are arranged on the grating At both ends of the diameter of the disk 25, the amount of change of the signal received at the first receiving tube 19 and the second receiving tube 30 is e, and the photoelectricity received by the first receiving tube 19 and the second receiving tube 30 is measured with a phase meter. The maximum phase difference a of the signal, this phase difference is brought by twice the eccentricity of the grating disc 25, assuming that the grating marking radius of the grating disc 25 is R, and the number of grating line pairs is m, then the line period is 2πR/m , the phase difference of one line period is 360°, then 2e=2πR·a/m/360°

So e=πR·a/m/360° (1)

The radial runout of the shafting can be obtained from formula (1).

Description of drawings:

Fig. 1 is the structural representation of prior art;

Fig. 2 is a structural schematic diagram of the present invention.

Detailed ways:

The present invention is implemented by the structure shown in FIG. 2 . Among them, the annular cage 36, the gland 37, the first screw 38, the main shaft 39, the first steel ball 40, the cylindrical cage 41, the second steel ball 42, and the shaft sleeve 43 are the rotating shaft system to be tested.

The fourth screw 14, the fifth screw 18, the sixth screw 22, the seventh screw 27, the eighth screw 29, the ninth screw 33, the third screw 35, the base 44, the second screw 45, and the fixed platform 46 are all Q235 , the first component holder 15, the ring pad 23, the pressure ring 24, and the second component holder 34 are all made of No. 45 steel, and the bases of the first indicating grating 16, the grating plate 25, and the second indicating grating 31 are all made of K9 glass , the first receiving tube circuit board 17, the first luminous tube circuit board 21, the second luminous tube circuit board 26, and the second receiving tube circuit board 28 all adopt plastic plates, the first receiving tube 19, the first luminous tube 20, the first luminous tube The second receiving tube 30 and the second luminous tube 32 are produced by Honeywell Company, the model of the luminous tube is SEP8505, and the model of the receiving tube is SDP8405.

The inner hole of the cylindrical cage 41 equipped with the first steel ball 40 is fitted on the main shaft 39, the outer side of the cylindrical cage 41 is fitted with the sleeve 43, and the annular cage 36 equipped with the second steel ball 42 The inner hole is sleeved on the lower part of the main shaft 39, and the gland 37 holds it up under the annular cage 36, and is fixed on the main shaft 39 with the first screw 38, thereby forming the measured rotating shaft system. The third screw 35 fixes the measured rotating shaft system on the base 44 through the axle sleeve 43, and the second screw 45 fixes the base 44 on the fixed platform 46, so that the axle sleeve 43 is fixed, and the main shaft 39 can rotate freely; The grating disc 25 and the main shaft 39 are coaxially installed on the shoulder of the main shaft 39, the grating disc 25 is equipped with an annular pad 23, and the ring pad 23 is pressed with a pressure ring 24, and the pressure ring 24 and the main shaft 39 are threaded. Fastening, so that the grating disc 25 is fastened on the main shaft 39; the first component rack 15 and the second component rack 34 are installed on both sides of the shaft system radially symmetrically relative to the main shaft 39, and the radial symmetry is Refers to the central connection line between the widths of the first component rack 15 and the second component rack 34, passing through the axis of the main shaft 39, the openings of the grooves of the two racks are opposite, and the first component rack 15 uses the fourth screw 14 Fixed on the fixed platform 46, the second component frame 34 is fixed on the fixed platform 46 with the ninth screw 33; In the slot; the groove top arm and the lower arm on the first component frame 15 and the second component frame 34 all leave a central hole, and these two holes are coaxial, and are located in the center hole of the top arm of the first component frame 15 On the lower surface; the first indicator grating 16 is glued on the lower surface of the top arm center hole of the first component rack 15, and the first receiving tube 19 is welded on the first receiving pipeline circuit board 17, and the first receiving tube 19 is installed in the center hole of the top arm of the first component rack 15, and the first receiving pipe circuit board 17 is fixed on the first component rack 15 with the fifth screw 18, and the first luminous tube 20 is welded on the first luminous tube On the circuit board 21, the first light-emitting tube 20 is installed in the center hole of the lower arm of the first component frame 15, and the first light-emitting tube circuit board 21 is fixed on the first component frame 15 with the sixth screw 22. Two indicator gratings 31 are glued on the lower surface of the top arm center hole of the second component frame 34, and the second receiving tube 30 is welded on the second receiving tube circuit board 28, and the second receiving tube 30 is installed on the second receiving tube 30. In the center hole of the top arm of the component frame 34, the second receiving tube circuit board 28 is fixed on the second component frame 34 with the eighth screw 29, and the second luminous tube 32 is welded on the second luminous tube circuit board 26, Install the second luminous tube 32 in the center hole of the lower arm of the second component frame 34 , and fix the circuit board 26 of the second luminous tube on the second component frame 34 with the seventh screw 27 .

The main shaft 39 rotates once, when the radial runout of the main shaft 39 is e, the center wobble of the grating disc 25 is also e, and the first receiving tube 19 and the second receiving tube 30 are arranged at both ends of the diameter of the grating disc 25. The amount of signal variation received at the first receiving tube 19 and the second receiving tube 30 place is e, and the phase difference maximum a of the photoelectric signals received by the first receiving tube 19 and the second receiving tube 30 is measured with a phase meter, This phase difference is caused by twice the eccentricity of the grating disc 25. If the grating marking radius of the grating disc 25 is R, and the number of grating line pairs is m, then the line period is 2πR/m, and the phase difference of one line period is 360 °, then e=πR a/m/360°, in this way, the radial runout of the shafting is obtained, and the radial runout of the rotating shafting is detected without touching the surface of the shafting, which reduces the processing difficulty of the detection surface And cost, while using non-contact method of detection, does not damage the surface to be detected, and improves the accuracy of detection.

Claims (1)

1. A non-contact detection device for radial runout of a rotating shaft system, comprising a third screw (35), an annular cage (36), a first screw (38), a main shaft (39), a first steel ball ( 40), a cylindrical cage (41), a second steel ball (42), a shaft sleeve (43), a base (44), a second screw (45), a fixed platform (46); it is characterized in that it also includes The fourth screw (14), the first component rack (15), the first indicator grating (16), the first receiving tube circuit board (17), the fifth screw (18), the first receiving tube (19), the first One luminous tube (20), the first luminous tube circuit board (21), the sixth screw (22), the ring pad (23), the pressure ring (24), the grating disc (25), the second luminous tube circuit board (26 ), the seventh screw (27), the second receiving tube circuit board (28), the eighth screw (29), the second receiving tube (30), the second indicating grating (31), the second luminous tube (32), The ninth screw (33), the second component frame (34), the gland (37); the inner hole of the cylindrical cage (41) with the first steel ball (40) is set on the main shaft (39) , the outer sleeve (43) of the cylindrical cage (41), the inner hole of the annular cage (36) with the second steel ball (42) is sleeved on the lower part of the main shaft (39), and the gland ( 37) Hold it up under the annular cage (36), and fix it on the main shaft (39) with the first screw (38) to form the measured rotating shaft system; the third screw (35) passes through the shaft sleeve ( 43) Fix the measured rotating shaft system on the base (44), fix the base (44) on the fixed platform (46) with the second screw (45), so that the shaft sleeve (43) is fixed, and the main shaft ( 39) free rotation; the grating disc (25) is coaxially installed on the shoulder of the main shaft (39) with the main shaft (39), and the ring pad (23) is loaded onto the grating disc (25). Push down with pressure ring (24), tighten with thread between pressure ring (24) and main shaft (39), grating disc (25) is fastened on the main shaft (39); the first component frame (15) and The second component rack (34) is installed on both sides of the shaft system radially symmetrically with respect to the main shaft (39). The radial symmetry refers to the first component rack (15) and the second component rack (34) ) through the axis of the main shaft (39), the groove openings of the two racks are opposite, and the fixed position of the two component racks can make the grating disc (25) stretch into the component rack to install the receiving tube and in the groove of the luminous tube; the groove top arm and the lower arm on the first component frame (15) and the second component frame (34) all leave a central hole, and these two holes are coaxial; adjust the first and The position of the second components is such that the center hole on the groove upper arm and the lower arm of the first component frame (15) is aligned with the center of the grating on the grating plate (25), so that the groove of the second component frame (34) The central hole on the upper arm and the lower arm of the groove is aligned with the center of the grating on the grating disk (25); the first component frame (15) is fixed on the On the fixed platform (46), the second component frame (34) is fixed on the fixed platform (46) with the ninth screw (33); the first indicator grating (16) is glued to the first component frame (15) On the lower surface of the center hole of the top arm, the first receiving tube (19) is welded on the first receiving tube circuit board (17), and the first receiving tube (19) is installed on the top of the first component rack (15) In the center hole of the arm, use the fifth screw (18) to fix the first receiving tube circuit board (17) on the first component frame (15), and the first luminous tube (20) is welded on the first luminous tube circuit board ( 21), install the first luminous tube (20) in the center hole of the lower arm of the first component rack (15), and use the sixth screw (22) to fix the first luminous tube circuit board (21) on the first On the component frame (15), the second indicator grating (31) is glued on the lower surface of the top arm center hole of the second component frame (34), and the second receiving tube (30) is welded on the second receiving tube On the circuit board (28), install the second receiving tube (30) in the center hole of the top arm of the second component rack (34), and fix the second receiving tube circuit board (28) with the eighth screw (29) On the second component frame (34), the second luminous tube (32) is welded on the second luminous tube circuit board (26), and the second luminous tube (32) is installed under the second component frame (34) In the center hole of the arm, the second light-emitting tube circuit board (26) is fixed on the second component frame (34) with the seventh screw (27).

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